<template>
  <div>
    <el-card>
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
    </el-card>
    <el-card>
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFromRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name" />
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number" />
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number" />
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number" />
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="i"
                  v-for="(i, index) in item.attr_vals"
                  :key="index"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="actionURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerInfo"
              list-type="picture"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button class="btn" type="primary" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" class="previewImg" alt="图片" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
import { getCategoriesList, cateAttributes, addGoods } from '@/api/goods'
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_weight: 0,
        goods_price: 0,
        goods_number: 0,
        // 商品的分类数组
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFromRules: {
        goods_name: [
          {
            required: true,
            message: '请输入商品名称',
            trigger: 'blur'
          }
        ],
        goods_price: [
          {
            required: true,
            message: '请输入商品价格',
            trigger: 'blur'
          }
        ],
        goods_weight: [
          {
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }
        ],
        goods_cat: [
          {
            required: true,
            message: '请选择商品分类',
            trigger: 'blur'
          }
        ]
      },
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      manyTableData: [],
      onlyTableData: [],
      actionURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerInfo: { Authorization: window.sessionStorage.getItem('token') },
      previewPath: '',
      previewDialogVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const res = await getCategoriesList()
      // console.log(res);
      if (res.meta.status !== 200) return this.$message.info('获取分类参数失败')
      this.cateList = res.data
    },
    // ewActiveName 即将进入的下一个标签index
    // oldActiveName 即将离开的标签index
    beforeTabLeave (newActiveName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        const res = await cateAttributes(this.addForm.goods_cat[2], {
          sel: 'many'
        })
        if (res.meta.status !== 200) { return this.$message.error('获取商品参数失败') }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const res = await cateAttributes(this.addForm.goods_cat[2], {
          sel: 'only'
        })
        // console.log(res);
        if (res.meta.status !== 200) { return this.$message.error('获取商品属性失败') }
        this.onlyTableData = res.data
      }
    },
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const fileIndex = this.addForm.pics.findIndex((i) => i.pic === filePath)
      this.addForm.pics.splice(fileIndex, 1)
    },
    handleSuccess (response) {
      const picInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
    },
    addGoods () {
      this.$refs.addFormRef.validate(async (vail) => {
        if (!vail) return this.$message.error('请填写完整表单')
        const _addForm = _.cloneDeep(this.addForm)
        _addForm.goods_cat = _addForm.goods_cat.join(',')
        // console.log(_addForm)
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        _addForm.attrs = this.addForm.attrs
        // console.log(_addForm);
        const res = await addGoods(_addForm)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style scoped>
.el-steps {
  margin: 20px 0;
}
.el-checkbox {
  margin: 0 5px 0 3px !important;
}
.previewImg {
  width: 100%;
}
.btn {
  margin: 15px;
}
</style>
